DR9305-CS 980811P.O. Box 478
Coppell, Texas 75019
972-462-0022
August 11, 1998
Mr. Bill Anderson
Dowdey, Anderson & Associates, Inc.
5225 Village Creek Drive, Suite 200
Plano, TX 75093
Re:
Floodplain Reclamation Study
Grapevine Springs Park
Dear Mr. Anderson:
I have reviewed your submittal for the floodplain study to obtain the final letter of map revision for
Grapevine Springs Park, which is now the land developing as Summit at the Springs. While I have no
problems with the study as submitted, I do have the following questions:
1. On the work map provided, it shows the locations of the cross sections and the associated elevations.
The upper Grapevine Creek, lower Grapevine Creek, and the main channel of Grapevine Creek all
provide stations with the floodplain elevations whereas the bypass channel provides stations with the
floodway elevations. Why the discrepancy on the elevations provided?
2. Please comment how on Section 6 of the main channel and Sections 110 and 6 of the bypass channel
that there is a slight increase in the floodplain elevation whereas a corresponding slight decrease in the
floodway elevation. This seems somewhat unusual.
3. The certification forms for Appendix A were not provided. Obviously those need to be provided for
my signature prior to submittal to FEMA. Also, the check for the processing fee was not provided.
Please contact me sometime during the week of August 17, 1998 to discuss the questions about the
floodplain and floodway. Once that has been resolved, forms should be submitted for my signatures. At
that time, copies will be returned back to you for your submittal to FEMA. Simultaneously with this
submittal to FEMA, the City will publish a notice in the local paper concerning the revisions to the
floodway. These questions concerning the study are not holding up the processing of the two amending
plats that have been submitted for Summit at the Springs. However, final resolution obviously will have
an impact on the homeowners flood insurance rates for the property adjacent to the creek.
Again, contact me sometime during the week of August 17 so we can resolve these minor issues.
Sincerely,
Kenneth M. Griffin, P.E.
Director of Engineering and Public Works